| Acronym | Definition |
|---|
| HNO➣Hals-Nasen-Ohren Heilkunde (German: throat, nose and ear medicine) |
| HNO➣Hals Nasen Ohrenheilkunde |
| HNO➣Host Network Operator |
| HNO➣Harvard News Office |
| HNO➣Helvetica Narrow Oblique (font) |
| HNO➣Hungarian National Observatory |
| HNO➣Houston-New Orleans, Inc. (Houston, TX) |